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Finding the Fourth Proportional to 63,770.92, 87,980.10 and 39,888.52

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Solution

The fourth proportional to 63,770.92, 87,980.10 and 39,888.52 is: 55,031.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,770.92 : 87,980.10 = 39,888.52 : x
  2. Step 2: Convert to fraction form
    63,770.92/87,980.10 = 39,888.52/x
  3. Step 3: Cross multiply
    63,770.92x = 87,980.10 × 39,888.52
  4. Step 4: Simplify right side
    63,770.92x = 3,509,395,978.45
  5. Step 5: Solve for x
    x = 3,509,395,978.45/63,770.92
  6. Step 6: Final answer
    x = 55,031.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.